
class Counter{
    public int count;
    synchronized public void increase(){
        count++;
    }
}
public class Demo15 {
    private static Counter counter=new Counter();
    public static void main(String[] args) throws InterruptedException {
        Thread t1=new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });
        Thread t2=new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });
        t1.start();;
        t2.start();

        t1.join();
        t2.join();
        System.out.println(counter.count);
    }

}
